Musnad Abu Ya'la al-Mawsili 154:207

And from Abdullah, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever keeps a dog, except for a hunting dog or a livestock dog, then two qirats from his reward decrease every day." It was said to him: "Indeed, Abu Hurairah says: 'Or a farm dog.'" He said: "Indeed, Abu Hurairah is a man of farming."